you're actually not the first person to ask this, lol. i was initially going to make the pong comic be about doom, but then the joke about a "fun activity for two" wouldn't be accurate (although i'm not actually sure. the og doom is singleplayer, right? i've never played it before...) i also thought it would be funny to make pong be k0tya's first ever videogame, since it was historically, too.
it's a secondary feature, so it isn't very optimized, but i think she should be capable of running any game that isn't resource heavy... anything old or pre-ps3 should be safe. if you tried to run the new baldur's gate on her i think her head would explode